bisecting fixing commit since 68d7a45eec101bc1550294c0e675a490c047b2e5
building syzkaller on 0a77c33cff83d9aa86d9043a7bb4e51512bf3222
testing commit 68d7a45eec101bc1550294c0e675a490c047b2e5 with gcc (GCC) 8.1.0
kernel signature: e48a64dd32804945947b8ab6fde2796956fe1681f5806db79b6401f0341f0542
all runs: crashed: WARNING in handle_ept_misconfig
testing current HEAD 98db2bf27b9ed2d5ed0b6c9c8a4bfcb127a19796
testing commit 98db2bf27b9ed2d5ed0b6c9c8a4bfcb127a19796 with gcc (GCC) 8.1.0
kernel signature: 4936cce5969c11efa77b58c09a657cf92a17f03ecc8c814bb06a91ea7c54034e
run #0: crashed: WARNING in handle_ept_misconfig
run #1: crashed: WARNING in handle_ept_misconfig
run #2: crashed: WARNING in handle_ept_misconfig
run #3: crashed: WARNING in handle_ept_misconfig
run #4: crashed: WARNING in handle_ept_misconfig
run #5: crashed: WARNING in handle_ept_misconfig
run #6: basic kernel testing failed: failed to copy test binary to VM: timedout ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor335951304" "root@10.128.15.216:./syz-executor335951304"]
Warning: Permanently added '10.128.15.216' (ECDSA) to the list of known hosts.

run #7: basic kernel testing failed: failed to copy test binary to VM: timedout ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor987938874" "root@10.128.15.208:./syz-executor987938874"]
Warning: Permanently added '10.128.15.208' (ECDSA) to the list of known hosts.

run #8: crashed: WARNING in handle_ept_misconfig
run #9: OK
revisions tested: 2, total time: 35m49.606362046s (build: 20m5.186522597s, test: 14m50.972263333s)
the crash still happens on HEAD
commit msg: Linux 4.14.171
crash: WARNING in handle_ept_misconfig
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
------------[ cut here ]------------
WARNING: CPU: 0 PID: 28623 at arch/x86/kvm/vmx.c:6956 handle_ept_misconfig+0x96/0x3a0 arch/x86/kvm/vmx.c:6952
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 28623 Comm: syz-executor206 Not tainted 4.14.171-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xf7/0x13b lib/dump_stack.c:58
 panic+0x1b0/0x36a kernel/panic.c:183
 __warn.cold.8+0x25/0x2a kernel/panic.c:547
 report_bug+0x1a4/0x1f3 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 do_error_trap+0x1bd/0x310 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963
RIP: 0010:handle_ept_misconfig+0x96/0x3a0 arch/x86/kvm/vmx.c:6956
RSP: 0018:ffff8880a61379a0 EFLAGS: 00010282
RAX: 00000000fffffff2 RBX: ffff88808b3a1140 RCX: 0000000000000000
RDX: ffffed1014c26ef8 RSI: 0000000000000000 RDI: ffffed1014c26f20
RBP: ffff8880a61379c8 R08: 0000000000000007 R09: ffff8880a6137860
R10: 0000000000000000 R11: 0000000000000303 R12: 000000000000f000
R13: 0000000000000031 R14: 0000000000000000 R15: 0000000000000000
 vmx_handle_exit+0x1b8/0x1160 arch/x86/kvm/vmx.c:9193
 vcpu_enter_guest+0xe05/0x4e40 arch/x86/kvm/x86.c:7316
 vcpu_run arch/x86/kvm/x86.c:7379 [inline]
 kvm_arch_vcpu_ioctl_run+0x257/0xed0 arch/x86/kvm/x86.c:7546
 kvm_vcpu_ioctl+0x45e/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x183/0xfc0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x74/0x80 fs/ioctl.c:692
 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x44abe9
RSP: 002b:00007f3130d1cce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000006dfc48 RCX: 000000000044abe9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00000000006dfc40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dfc4c
R13: 00007fffd4daa7cf R14: 00007f3130d1d9c0 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..